We remind that no candidate events were found in all previously made analyses that we reuse and combine here.
For the statistical analysis, there were three main data bins, see Table REF .
The bins 1 and 3 were further subdivided into bins corresponding to different years and conditions. The total number of bins was up to 9.
The backgrounds and various uncertainties in these bins were estimated in the previously published
analyses [1]}, [2]}, [3]}, [4]} and reused.
This concerns also most of the signal yield uncertainties. The uncertainties depending on the \(a\)  energy and path to decay
distributions were recalculated for the new signal samples, but turned out to be compatible with the values determined previously
and remained unchanged. All uncertainties, summed up in quadrature, don't exceed 20%.
<TABLE>